Flexible bookmark



FIG. 1 is a perspective view showing my new design for a flexible bookmark;

FIG. 2 is a front view thereof, the rear view being a mirror image;

FIG. 3 is a right side view thereof, the left side being a mirror image; and,

FIG. 4 is a top view thereof, the bottom view being a mirror image. 

The ornamental design for a flexible bookmark, as shown and described. 